/* __gmp_doprnt_integer -- integer style formatted output.

   THE FUNCTIONS IN THIS FILE ARE FOR INTERNAL USE ONLY.  THEY'RE ALMOST

   CERTAIN TO BE SUBJECT TO INCOMPATIBLE CHANGES OR DISAPPEAR COMPLETELY IN

   FUTURE GNU MP RELEASES.

Copyright 2001 Free Software Foundation, Inc.

This file is part of the GNU MP Library.

The GNU MP Library is free software; you can redistribute it and/or modify

it under the terms of either:

  * the GNU Lesser General Public License as published by the Free

    Software Foundation; either version 3 of the License, or (at your

    option) any later version.

or

  * the GNU General Public License as published by the Free Software

    Foundation; either version 2 of the License, or (at your option) any

    later version.

or both in parallel, as here.

The GNU MP Library is distributed in the hope that it will be useful, but

WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY

or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

for more details.

You should have received copies of the GNU General Public License and the

GNU Lesser General Public License along with the GNU MP Library.  If not,

see https://www.gnu.org/licenses/.  */

#include <stdarg.h>    /* for va_list and hence doprnt_funs_t */

#include <string.h>

#include <stdio.h>

#include <stdlib.h>

#include "gmp.h"

#include "gmp-impl.h"

int

__gmp_doprnt_integer (const struct doprnt_funs_t *funs,

		      void *data,

		      const struct doprnt_params_t *p,

		      const char *s)

{

  int         retval = 0;

  int         slen, justlen, showbaselen, sign, signlen, slashlen, zeros;

  int         justify, den_showbaselen;

  const char  *slash, *showbase;

  /* '+' or ' ' if wanted, and don't already have '-' */

  sign = p->sign;

  if (s[0] == '-')

    {

      sign = s[0];

      s++;

    }

  signlen = (sign != '\0');

  /* if the precision was explicitly 0, print nothing for a 0 value */

  if (*s == '0' && p->prec == 0)

    s++;

  slen = strlen (s);

  slash = strchr (s, '/');

  showbase = NULL;

  showbaselen = 0;

  if (p->showbase != DOPRNT_SHOWBASE_NO)

    {

      switch (p->base) {

      case 16:  showbase = "0x"; showbaselen = 2; break;

      case -16: showbase = "0X"; showbaselen = 2; break;

      case 8:   showbase = "0";  showbaselen = 1; break;

      }

    }

  den_showbaselen = showbaselen;

  if (slash == NULL

      || (p->showbase == DOPRNT_SHOWBASE_NONZERO && slash[1] == '0'))

    den_showbaselen = 0;

  if (p->showbase == DOPRNT_SHOWBASE_NONZERO && s[0] == '0')

    showbaselen = 0;

  /* the influence of p->prec on mpq is currently undefined */

  zeros = MAX (0, p->prec - slen);

  /* space left over after actual output length */

  justlen = p->width

    - (strlen(s) + signlen + showbaselen + den_showbaselen + zeros);

  justify = p->justify;

  if (justlen <= 0) /* no justifying if exceed width */

    justify = DOPRNT_JUSTIFY_NONE;

  if (justify == DOPRNT_JUSTIFY_RIGHT)             /* pad right */

    DOPRNT_REPS (p->fill, justlen);

  DOPRNT_REPS_MAYBE (sign, signlen);               /* sign */

  DOPRNT_MEMORY_MAYBE (showbase, showbaselen);     /* base */

  DOPRNT_REPS_MAYBE ('0', zeros);                  /* zeros */

  if (justify == DOPRNT_JUSTIFY_INTERNAL)          /* pad internal */

    DOPRNT_REPS (p->fill, justlen);

  /* if there's a showbase on the denominator, then print the numerator

     separately so it can be inserted */

  if (den_showbaselen != 0)

    {

      ASSERT (slash != NULL);

      slashlen = slash+1 - s;

      DOPRNT_MEMORY (s, slashlen);                 /* numerator and slash */

      slen -= slashlen;

      s += slashlen;

      DOPRNT_MEMORY (showbase, den_showbaselen);

    }

  DOPRNT_MEMORY (s, slen);                         /* number, or denominator */

  if (justify == DOPRNT_JUSTIFY_LEFT)              /* pad left */

    DOPRNT_REPS (p->fill, justlen);

 done:

  return retval;

 error:

  retval = -1;

  goto done;

}